From Ohio History Central
Unitarianism is a Christian religious denomination. Unitarians believe that God is only one person. Unitarians reject the Trinity and do not believe that Jesus Christ was the Son of God. Followers of Unitarianism also do not accept the concepts of original sin and of eternal punishment for sins committed on earth. They contend that there is no basis for either of these beliefs in the Bible. They practice communion, but they do not view it as a formal sacrament. Rather, communion symbolizes Unitarian devotion to living together in a godly manner.
Unitarians arrived in the Northwest Territory during the late 1700s and the early 1800s. Like the Universalists who held similar beliefs, the Unitarians remained few in number. Most Unitarians resided in larger cities like Cincinnati, Cleveland, and Columbus. One of the more prominent Unitarians of the early 1800s was Nathan Guilford, the first superintendent of Cincinnati schools and a man heavily involved in establishing free public education in Ohio.
In 1961, the American Unitarian Association joined with the Universalist Church of America to become the Unitarian Universalist Association.